SBN0064G Datasheet, PDF (22/37 Pages) List of Unclassifed Manufacturers – Dot-matrix STN LCD 64-SEGMENT Driver with 64-row x 64-column Display Data Memory

Avant Electronics
SBN0064G
Dot-matrix STN LCD 64-SEGMENT Driver with 64-row x 64-column Display Data Memory
9 LCD BIAS CIRCUIT
A typical LCD bias circuit is shown Fig. 13. The condition V_DD≥ V1 ≥ V2 ≥ V3 ≥ V4 ≥ V5 must always be met. The
maximum allowed voltage for LCD bias (V_LCD=V_DD-V₅) should not exceed 13 volts. Note that V0 should be connected to
V_DD.
COMPONENT
C
R1
R2
R3
RECOMMENDED
VALUE
0.1 µF,
electrolytic
2.2K
10K
10K
V_DD
C
C
C
C
Note:
C
(1) V0 should always be connected to V_DD.
(2) For cascading application, it is recommended that a
buffer be added for each of V1, V2, V3, V4, and V5.
For 64 COM x 64 SEG application, these buffers are
not needed.
(3) The LCD bias voltage (V_LCD = V0 - V5) should not
exceed 13 volts, without regard to display duty.
(4) The voltage difference between V_DD (the most
positive power) and V_EE (the most negative
power), V_DD - V_EE, should not exceeds 16 volts,
without regards to display duty.
V_DD
V0
V_DD
V0L/V0R
R1
V1 _{To SBN6400G SBN0064G}
R1 _V2
V2R/V2L
R2 _V3
V3R/V3L
R1
V4 _{To SBN6400G}
SEG0~SEG63
R1
V5
V5R/V5L
R3
V_EE1,V_EE2 V_SS
V_EE
Fig.13 LCD Bias circuit
2005 May 20
22 of 37
data sheet (v3)